Method of generating infill geometry from a native computer aided design (CAD) file

ABSTRACT

The method includes: obtaining a first file of a computer-aided design (CAD) application; identifying, within the first file, a first 3D shape associated with a 3D infill pattern; generating a second file including: a first section specifying the 3D infill pattern; and a second section including instructions describing the first 3D shape filled with multiple instances of the 3D infill pattern by referencing the first section. The first section and the second section are separate in the second file.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a continuation application of U.S. patent application Ser. No.15/395,435, filed on Dec. 30, 2016, the contents of which areincorporated herein by reference in their entirety.

BACKGROUND

Additive manufacturing (AM) is a manufacturing process thatincrementally accretes material onto an object. AM technologies includethose that involve extruding a material from a small nozzle; fusing orsolidifying a material in a tank of power or liquid; or stacking andgluing cut layers (e.g., cut layers of paper), etc. A slicer is softwarethat converts a 3D description of an object into commands that control a3D printer (e.g., AM device). In contrast, conventional milling isconsidered “subtractive” in that it involves removal of material to formthe desired shape. The same is also true for bulk-forming techniques,such as casting, forging, and injection molding, which are not accretivebut form an entire shape at once.

Users often wish to print three-dimensional (3D) shapes having 3D infillpatterns, which are patterns that fill the inside of the 3D shape (e.g.,checkerboard of cubes, honeycomb, etc.). Further, users often wish toprint 3D shapes having texture patterns, which are raised patterns(e.g., small nubbins) applied to an external surface of the 3D shape(e.g., to improve the grip, to change the fluid flow across the surface,etc.). Additionally or alternatively, users often want the 3D infillpatterns and/or texture patterns to have specific bulk properties (e.g.,density, tensile strength, etc.)

However, specifying 3D infill patterns and texture patterns in acomputer aided design (CAD) can be difficult because the user mustspecify every detail instead of specifying a high-level intent. Further,because every detail has been specified, the resulting files that aresent to the slicer for printing tend to be very large. Further,generation of these files is slicer specific, and thus re-generationmust take place for different slicers. Further still, the user must alsotake into account the print parameters of 3D infill patterns (evenwell-known 3D infill patterns), the printing material, and the hardware(i.e., mechanical components) of the 3D printer in order to print a 3Dshape with specific bulk properties. Regardless, users are stillinterested in printing 3D shapes with 3D infill patterns and/or texturepatterns.

SUMMARY

In general, in one aspect, the invention relates to a method forthree-dimensional (3D) printing. The method comprises: obtaining anative file of a computer-aided design (CAD) application; identifying,within the native file, a first 3D shape associated with a 3D infillpattern; generating a slicer description language file comprising: afirst section specifying the 3D infill pattern; and a second sectioncomprising instructions to print the first 3D shape filled with multipleinstances of the 3D infill pattern by referencing the first section,wherein the first section and the second section are separate in theslicer description language file; and sending the slicer descriptionlanguage file to a 3D printer for printing the first 3D shape filledwith the 3D infill pattern.

In general, in one aspect, the invention relates to a non-transitorycomputer readable medium (CRM) storing computer readable program code.The computer readable program code, when executed by a computerprocessor: obtains a native file of a computer-aided design (CAD)application; identifies, within the native file, a first 3D shapeassociated with a 3D infill pattern; generates a slicer descriptionlanguage file comprising: a first section specifying the 3D infillpattern; and a second section comprising instructions to print the first3D shape filled with multiple instances of the 3D infill pattern byreferencing the first section, wherein the first section and the secondsection are separate in the slicer description language file; and sendsthe slicer description language file to a 3D printer for printing thefirst 3D shape filled with the 3D infill pattern.

In general, in one aspect, the invention relates to a system forthree-dimensional (3D) printing. The system comprises: a memory; acomputer processor that: obtains a native file of a computer-aideddesign (CAD) application; identifies, within the native file, a first 3Dshape associated with a 3D infill pattern; generates a slicerdescription language file comprising: a first section specifying the 3Dinfill pattern; and a second section comprising instructions to printthe first 3D shape filled with multiple instances of the 3D infillpattern by referencing the first section, wherein the first section andthe second section are separate in the slicer description language file;and sends the slicer description language file; and a 3D printer that:receives the slicer description language file; and prints, based on theslicer description language file, the first 3D shape filled with the 3Dinfill pattern.

Other aspects of the invention will be apparent from the followingdescription and the appended claims.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows a system in accordance with one or more embodiments of theinvention.

FIG. 2 and FIG. 3 show flowcharts in accordance with one or moreembodiments of the invention.

FIG. 4A and FIG. 4B show examples in accordance with one or moreembodiments of the invention.

FIG. 5 shows a computer system in accordance with one or moreembodiments of the invention.

DETAILED DESCRIPTION

Specific embodiments of the invention will now be described in detailwith reference to the accompanying figures. Like elements in the variousfigures are denoted by like reference numerals for consistency.

In the following detailed description of embodiments of the invention,numerous specific details are set forth in order to provide a morethorough understanding of the invention. However, it will be apparent toone of ordinary skill in the art that the invention may be practicedwithout these specific details. In other instances, well-known featureshave not been described in detail to avoid unnecessarily complicatingthe description.

In general, embodiments of the invention provide for a method, a system,and a non-transitory computer readable medium (CRM) for 3D printing.Specifically, a 3D shape with a 3D infill pattern and/or a texturepattern is identified within a native file of a computer-aided design(CAD) application. A slicer description language (SDL) file is generatedbased on the native file. The SDL file has multiple sections (e.g.,blocks of code) including: a section specifying the 3D infill pattern; asection specifying the texture pattern; and a section includinginstructions to print the 3D shape according to the 3D infill patternand the texture pattern by referencing the other sections. In one ormore embodiments of the invention, the SDL file may also include one ormore user-desired bulk properties of the 3D infill pattern and/or thetexture pattern. The slicer receives the SDL file and then determinesvarious print parameters of the 3D infill pattern and/or the texturepattern based on the printing material (e.g., rubber, plastic, etc.) andthe 3D printer hardware (i.e., mechanical components). The 3D shape canthen be printed in accordance with the user's high-level intent/goals(e.g., desired bulk properties).

FIG. 1 shows a system (100) in accordance with one or more embodimentsof the invention. As shown in FIG. 1, the system (100) includes acomputing device (104) executing a CAD application (106). The computingdevice (104) may be a personal computer (PC), a server, a laptop, amobile computing device (e.g., smart phone, tablet PC, etc.), a kiosk,etc. The system (100) also includes a 3D printer (120). The computingdevice (104) and the 3D printer (120) may be part of the same unit.Alternatively, the computing device (104) and the 3D printer (120) maybe connected by a computer network of any size having wired and/orwireless segments.

In one or more embodiments of the invention, the CAD application (106)enables a user to create (i.e., design, model, etc.) one or more 3Dshapes. A 3D shape may be created using libraries of simpler/basic 3Dshapes. A created 3D shape may be stored in a native file (102) of theCAD application (106). The native file (102) may be retrieved at afuture time to edit or view the created 3D shape. The native file (102)may store surface description(s) or volumetric description(s) of thecreated 3D shape.

In one or more embodiments of the invention, the CAD application (106)enables a user to select a 3D infill pattern (e.g., honeycomb, cubedcheckerboard, known lattice pattern, etc.) to “fill” a created 3D shape.The 3D infill pattern may need to be repeated multiple times (i.e.,multiple instances of the 3D infill pattern) to completely “fill” the 3Dshape (i.e., the volume of the 3D infill pattern may be much smallerthan the volume of the 3D shape). The CAD application (106) also enablesa user to remove the 3D infill pattern applied to a 3D shape or replacethe existing 3D infill pattern applied to the 3D shape with a different3D infill pattern. The CAD application (106) may include a library ofexisting 3D infill patterns from which the user can choose a 3D infillpattern to apply to the created 3D shape.

Those skilled in the art, having the benefit of this detaileddescription, will appreciate that if the 3D shape is printed, the 3Dinfill pattern “filling” the 3D shape might or might not be visible tothe user. However, the 3D infill pattern “filling” the 3D shape affectsthe structural properties of the printed 3D shape. Moreover, the 3Dinfill pattern has one or more bulk properties (e.g., density, tensilestrength, etc.) that are highly dependent on the printing material. Inone or more embodiments of the invention, the CAD application (106)enables a user to specify one or more desired bulk properties of the 3Dinfill pattern applied to a 3D shape. The selected 3D infill pattern andits user-desired bulk properties may be stored in the native file (102).

In one or more embodiments of the invention, the CAD application (106)enables a user to select a texture pattern (e.g., raised patterns suchas small nubbins) for application to a surface (e.g., external surface)of the created 3D shape. Different surfaces of the 3D shape may havedifferent texture patterns. The CAD application (106) also enables auser to remove the texture pattern applied to a surface of a 3D shape orreplace the existing texture pattern applied to the surface of the 3Dshape with a different texture pattern. The CAD application (106) mayinclude a library of existing texture patterns from which the user canchoose a texture pattern for application to the surface of a created 3Dshape.

Those skilled in the art, having the benefit of this detaileddescription, will appreciate that if the 3D shape is printed, thetexture pattern might be visible/perceivable to the user. The texturepattern may have one or more bulk properties that are highly dependenton the printing material. For example, the texture pattern may affectfluid flow across the surface of the 3D shape. As another example, thetexture pattern may affect the grip (or the user's ability to grip) the3D shape. In one or more embodiments of the invention, the CADapplication (106) enables a user to specify one or more desired bulkproperties of the texture pattern. The selected texture pattern and itsuser-desired bulk properties may be stored in the native file (102).

In one or more embodiments, the computing device (104) and the 3Dprinter (120) communicate by way of a slicer description language (SDL)file (110). The SDL file (110) is generated by the CAD application (106)based on the native file (102). Additionally or alternatively, the SDLfile (110) may be generated by another software application (not shown)from the native file (102).

As shown in FIG. 1, the SDL file (110) has multiple sections (e.g.,blocks of code) including: a 3D infill pattern section (112), a texturepattern section (114), and multiple 3D shape sections (i.e., 3D Shape Asection (116A), 3D Shape B section (116B)). The SDL file is effectivelya description of what should be printed by the 3D printer (120).Although the SDL file (110) of FIG. 1 has only one 3D infill patternsection (112) and only one texture pattern section (114), in otherembodiments, there may be multiple 3D infill pattern sections and/ormultiple texture pattern sections.

In one or more embodiments, the 3D infill pattern section (112)specifies a 3D infill pattern. The 3D infill pattern may be specified byits name (e.g., honeycomb) or a unique identifier known to the slicer ofthe 3D printer (120). Additionally or alternatively, the 3D infillpattern may be specified by one or more instructions to create ageometric unit of the 3D infill pattern. During printing, the geometricunit would be printed repeatedly to fill a 3D shape. However, the 3Dinfill pattern section (112) only has a single instance of the geometricunit of the 3D infill pattern. The 3D infill pattern section (112) mayalso specify one or more user-desired bulk properties of the specified3D infill pattern. Additionally or alternatively, the one or moreuser-desired bulk properties may be specified in a different section(e.g., 3D shape section (116A, 116B)).

In one or more embodiments, the texture pattern section (114) specifiesa texture pattern. The texture pattern may be specified by its name or aunique identifier known to the slicer of the 3D printer (120).Additionally or alternatively, the texture pattern may be specified byone or more instructions to create a geometric unit of the texturepattern. During printing, the geometric unit would be printed repeatedlyto cover the surface of a 3D shape. However, the texture pattern section(114) only has a single instance of the geometric unit of the texturepattern. The texture pattern section (114) may also specify one or moreuser-desired bulk properties of the texture pattern. Additionally oralternatively, the one or more user-desired bulk properties may bespecified in a different section (e.g., 3D shape section (116A, 116B)).

In one or more embodiments of the invention, each 3D shape section(116A, 116B) includes instructions to print a 3D shape. Theseinstructions may include a reference to the 3D infill pattern section(122) if the 3D shape should be filled with the 3D infill pattern. Theseinstructions might also specify one or more user-desired bulk propertiesfor the 3D infill pattern that will fill the 3D shape. Additionally oralternatively, these instructions may include a reference to the texturepattern section (114) if the texture pattern should be applied to asurface of the 3D shape. These instructions might also specify one ormore user-desired bulk properties for the texture pattern to be appliedto the 3D shape.

Those skilled in the art, having the benefit of this detaileddescription, will appreciate that within the SDL file (110), a 3D shapeand a 3D infill pattern are specified separately/independently. If thereare multiple 3D shapes to be printed with the same 3D infill pattern,each 3D shape section (116A, 116B) may include a reference to the one 3Dinfill pattern section (112). Similarly, if the specified texturepattern is to be applied to multiple 3D shapes, each 3D shape section(116A, 116B) may include a reference to the one texture pattern section(114). By specifying the 3D infill pattern and the texture patternseparately from the 3D shapes to be printed, the size of the SDL file(110) may be reduced. Further, by specifying only a single geometricunit of the 3D infill pattern and/or texture pattern, the size of theSDL file (110) may also be reduced.

In one or more embodiments of the invention, the 3D printer (120) prints3D shapes (e.g., printed 3D shapes (130)). Although not shown in FIG. 1,the 3D printer (120) may include a slicer that interprets the SDL file(110) and generates commands that control the 3D printer (120). In otherwords, the slicer interprets the SDL file (110) into basic commands forthe 3D printer's printing technology and mechanical components (e.g.,nozzles). The 3D printer (120) prints the 3D shapes with the appropriate3D infill patterns and/or texture patterns. As discussed above, this mayinclude repeatedly printing the single geometric unit specified in the3D infill pattern.

In one or more embodiments, as also discussed above, the SDL file (110)may specify a bulk property for a 3D infill pattern or a texturepattern. The slicer (120) determines one or print parameters of the 3Dinfill pattern or texture pattern in order to meet the user-desired bulkproperty. This determination may be based on the printing material(e.g., rubber, plastic, etc.) being used as well as the printingtechnology and mechanical components being utilized by the 3D printer(120). In other words, the SDL file (110) conveys the user's high-levelintentions/goals, while leaving specific implementation details to theslicer (120).

For example, in the case of a 3D infill pattern, the slicer may includea function ƒ such that for a given printing material m, the latticepattern l specified in the SDL file (110), and a user-desired tensilestrength s also specified in the SDL file (110), a lattice thickness(i.e., a print parameter) t=ƒ(m, l, s) achieves the desired strength. Asanother example, in the case of a texture pattern, the slicer (120) mayinclude a function n such that for printing material m, the texturepattern r specified in the SDL file (110), and a user-desired grip valueg also specified in the SDL file (110), a surface pattern-scale (i.e., aprint parameter) t=n(m, r, g) achieves the desired grip value.

Although FIG. 1 only shows the one 3D printer (120), in otherembodiments, there may be multiple 3D printers, and the slicer of each3D printer is capable of interpreting the SDL file (110). Accordingly,there is no need to regenerate the SDL file (110) and there is no needto generate slicer specific SDL files. This reduces the likelihood oferrors in the SDL file generation process.

FIG. 2 shows a flowchart in accordance with one or more embodiments ofthe invention. The flowchart depicts a process for 3D printing. One ormore of the steps in FIG. 2 may be performed by the components of thesystem (100), discussed above in reference to FIG. 1. In one or moreembodiments of the invention, one or more of the steps shown in FIG. 2may be omitted, repeated, and/or performed in a different order than theorder shown in FIG. 2. Accordingly, the scope of the invention shouldnot be considered limited to the specific arrangement of steps shown inFIG. 2.

Initially, a native file of a CAD application is obtained (STEP 205).The native file may be downloaded from a website. The CAD applicationenables a user to create 3D shapes and specify 3D infill patterns and/ortexture patterns for the 3D shapes. Accordingly, the native file mayinclude surface descriptions and/or volumetric descriptions of one ormore 3D shapes created by a user with the CAD application. The nativefile may also specify the 3D infill patterns and/or texture patterns. InSTEP 210, 3D shapes having 3D infill patterns and/or texture patterns onthe surfaces are identified from (e.g., by parsing) the native file.

In STEP 215, an SDL file is generated from the native file. The SDL filemay include multiple separate sections (e.g., blocks of code): onesection for each 3D infill pattern; one section for each texturepattern; and one section for each 3D shape.

A section for a 3D infill pattern may specify the 3D infill pattern byname or by a unique identifier. Additionally or alternatively, thesection may include instructions/commands for generating a singlegeometric unit of the 3D infill pattern. The geometric unit would needto be repeatedly printed to fill a 3D shape (i.e., multiple instances ofthe 3D infill pattern may be needed to fill the 3D shape). As multiple3D shapes may be filled with the same 3D infill pattern, there may bemultiple references to the same 3D infill pattern section.

Similarly, a section for a texture pattern may specify the texturepattern by name or by a unique identifier. Additionally oralternatively, the section may include instructions/commands forgenerating a single geometric unit of the texture pattern. The geometricunit would need to be repeatedly printed to cover the surface of a 3Dshape. As multiple 3D shapes may be covered by the same texture pattern,there may be multiple references to the same texture pattern section.

A section for a 3D shape includes instructions for generating the 3Dshape. If the 3D shape is to be filled with a 3D infill pattern, theinstructions include a reference to the section for the 3D infillpattern. Similarly, if a surface of the 3D shape is to be covered with atexture pattern, the instructions include a reference to the section forthe texture pattern.

In STEP 220, the SDL file is sent to the slicer of a 3D printer. Theslicer generates the 3D shapes according to the SDL file. In order toprint the 3D shapes specified in the SDL file, the slicer must interpretthe SDL file into basic commands for the 3D printer's printingtechnology and mechanical components (e.g., nozzles). The 3D printerprints the 3D shapes with the appropriate 3D infill patterns and/ortexture patterns. As discussed above, this may include repeatedlyprinting the single geometric unit specified in the 3D infill patternsection and/or texture pattern section.

FIG. 3 shows a flowchart in accordance with one or more embodiments ofthe invention. The flowchart depicts a process for 3D printing. One ormore of the steps in FIG. 3 may be performed by the components of thesystem (100), discussed above in reference to FIG. 1. The processdepicted in FIG. 3 may be considered an augmented version of the processdepicted in FIG. 2. In other words, some of the steps in FIG. 3 may bemerged with steps in FIG. 2 or added to the steps in FIG. 2. In one ormore embodiments of the invention, one or more of the steps shown inFIG. 3 may be omitted, repeated, and/or performed in a different orderthan the order shown in FIG. 3. Accordingly, the scope of the inventionshould not be considered limited to the specific arrangement of stepsshown in FIG. 3.

Initially, a native file for a CAD application is obtained (STEP 305).STEP 305 is essentially the same as STEP 205, discussed above inreference to FIG. 2. However, the native file includes a user-desiredbulk property (e.g., density, tensile strength, etc.) of the 3D infillpattern. In STEP 310, a 3D shape having the 3D infill pattern with theuser-desired bulk property is identified from (e.g., by parsing) thenative file.

In STEP 315, a SDL file is generated. STEP 315 is essentially the sameas STEP 215, discussed above in reference to FIG. 2. However, in STEP315, the section of the SDL file that specifies the 3D infill patternalso specifies the user-desired bulk property. The SDL file may be sentto a slicer of a 3D printer. Additionally or alternatively, the bulkproperty may be specified in any section of the SDL file.

In STEP 320, the slicer determines one or more print parameters of the3D infill pattern in order to meet the user-desired bulk property. Thisdetermination may be based on the printing material (e.g., rubber,plastic, etc.) being used as well as the printing technology andmechanical components being utilized by the 3D printer. For example, ifthe 3D infill pattern is a honeycomb, the print parameter may be thesize of a cell of the honeycomb or the thickness of a wall of a cell. Ifthe 3D pattern is a 3D checkerboard, the print parameter may be thevolume of each cube in the checkerboard.

In STEP 325, the 3D printer prints the 3D shape filled with multipleinstances of the 3D infill pattern according to the determined printparameters. As a result, the printed 3D shape filled with multipleinstances of the 3D infill pattern has the user-desired bulk property.

Although the process in FIG. 3 explicitly mentions a 3D infill pattern,the process is similar for texture patterns. The SDL file includes theuser-specified bulk property for the texture pattern, and the slicerdetermines one or more print parameters based on the printing materialand the hardware of the 3D printer to realize the user-desired bulkproperty.

FIGS. 4A and 4B show examples in accordance with one or more embodimentsof the invention. Specifically, FIG. 4A shows SDL file A (400A)generated by a CAD application (not shown). As shown in FIG. 4A, SDLfile A (400A) includes both a 3D infill pattern section (402) and a 3Dshape section (404). Assume the command <draw cube (k) at (x, y, z)>prints a cube having dimensions k×k×k at position x, y, z. The 3D infillpattern section (402) includes the commands to print a single geometricunit of 3D infill pattern 1 (i.e., a 3D checkerboard). The 3D shapesection (404) includes a command to print a cube having dimensions20×20×20. The command also includes a reference (406) to the 3D infillpattern section (402). Accordingly, the 3D printer will print the20×20×20 cube and “fill” it with the 3D checkboard pattern specified inthe 3D infill pattern section (402). The 3D printer will need torepeatedly print 3D infill pattern 1 to “fill” the 20×20×20 cube.

FIG. 4B shows SDL file B (400B) also generated by a CAD application. Asshown in FIG. 4B, SDL file B (400B) includes both a 3D infill patternsection (452) and a 3D shape section (454). The 3D infill patternsection (452) specifies 3D infill pattern 2 (i.e., honeycomb). The 3Dinfill patterns section (452) also specifies a user-desired bulkproperty (499) of the honeycomb pattern. Specifically, the user-desiredbulk property is a density of 350 grams/L. The 3D shape section (454)includes a command to print a cube having dimensions 15×15×15. Thecommand also includes a reference (456) to the 3D infill pattern section(452). The slicer will determine the proper print parameter(s) of ahoneycomb pattern in order to achieve the specified average patterndensity, given the density of the material being used in the 3D printer.For instance, if the material used in the 3D printer had a density of700 grams/L, then the slicer would choose pattern parameters to achievea 50:50 ratio of print material and empty space.

In this case parameters could be varied in a number of ways to achievethat ratio. For instance, it could be achieved by keeping the honeycombcell size fixed, and varying the cell wall thickness; or keeping thecell wall thickness fixed and varying the size; or a combination ofthese; or changing other parameters. That determination could be left upto the slicer, or could be specified by the user by means of additionalcommands in SDL file B (400B).

Various embodiments of the invention may have one or more of thefollowing advantages: the ability to apply 3D infill patterns and/ortexture patterns to 3D shapes in a CAD application; the ability tospecify a user's high-level intent in an SDL file; the ability toseparately specify a 3D infill pattern from a 3D shape in an SDL file;the ability to separately specify a texture pattern from a 3D shape inan SDL file; the ability to specify desired bulk properties of a 3Dinfill pattern or texture pattern; the ability to reduce the size of anSDL file using references; the ability to avoid slicer specific SDLfiles; the ability to specify a geometric unit of a 3D infill pattern ortexture pattern in an SDL file; etc.

Embodiments of the invention may be implemented on virtually any type ofcomputing system, regardless of the platform being used. For example,the computing system may be one or more mobile devices (e.g., laptopcomputer, smart phone, personal digital assistant, tablet computer, orother mobile device), desktop computers, servers, blades in a serverchassis, or any other type of computing device or devices that includesat least the minimum processing power, memory, and input and outputdevice(s) to perform one or more embodiments of the invention. Forexample, as shown in FIG. 5, the computing system (500) may include oneor more computer processor(s) (502), associated memory (504) (e.g.,random access memory (RAM), cache memory, flash memory, etc.), one ormore storage device(s) (506) (e.g., a hard disk, an optical drive suchas a compact disk (CD) drive or digital versatile disk (DVD) drive, aflash memory stick, etc.), and numerous other elements andfunctionalities. The computer processor(s) (502) may be an integratedcircuit for processing instructions. For example, the computerprocessor(s) may be one or more cores, or micro-cores of a processor.The computing system (500) may also include one or more input device(s)(510), such as a touchscreen, keyboard, mouse, microphone, touchpad,electronic pen, or any other type of input device. Further, thecomputing system (500) may include one or more output device(s) (508),such as a screen (e.g., a liquid crystal display (LCD), a plasmadisplay, touchscreen, cathode ray tube (CRT) monitor, projector, orother display device), a printer, external storage, or any other outputdevice. One or more of the output device(s) may be the same or differentfrom the input device(s). The computing system (500) may be connected toa network (512) (e.g., a local area network (LAN), a wide area network(WAN) such as the Internet, mobile network, or any other type ofnetwork) via a network interface connection (not shown). The input andoutput device(s) may be locally or remotely (e.g., via the network(512)) connected to the computer processor(s) (502), memory (504), andstorage device(s) (506). Many different types of computing systemsexist, and the aforementioned input and output device(s) may take otherforms.

Software instructions in the form of computer readable program code toperform embodiments of the invention may be stored, in whole or in part,temporarily or permanently, on a non-transitory computer readable mediumsuch as a CD, DVD, storage device, a diskette, a tape, flash memory,physical memory, or any other computer readable storage medium.Specifically, the software instructions may correspond to computerreadable program code that when executed by a processor(s), isconfigured to perform embodiments of the invention.

Further, one or more elements of the aforementioned computing system(500) may be located at a remote location and connected to the otherelements over a network (512). Further, one or more embodiments of theinvention may be implemented on a distributed system having a pluralityof nodes, where each portion of the invention may be located on adifferent node within the distributed system. In one embodiment of theinvention, the node corresponds to a distinct computing device.Alternatively, the node may correspond to a computer processor withassociated physical memory. The node may alternatively correspond to acomputer processor or micro-core of a computer processor with sharedmemory and/or resources.

While the invention has been described with respect to a limited numberof embodiments, those skilled in the art, having benefit of thisdisclosure, will appreciate that other embodiments can be devised whichdo not depart from the scope of the invention as disclosed herein.Accordingly, the scope of the invention should be limited only by theattached claims.

What is claimed is:
 1. A method for three-dimensional (3D) printing,comprising: obtaining a native file of a computer-aided design (CAD)application; identifying, within the native file, a first 3D shapeassociated with a 3D infill pattern and a bulk property of the 3D infillpattern; generating a slicer description language file comprising: afirst section specifying the 3D infill pattern; and a second sectioncomprising instructions to print the first 3D shape filled with multipleinstances of the 3D infill pattern by referencing the first section,wherein the first section and the second section are separate in theslicer description language file, and wherein one of the first sectionand the second section specifies the bulk property of the 3D infillpattern; sending the slicer description language file to a 3D printerthat includes a slicer software and that utilizes a printing material;determining, by the slicer, a print parameter of the 3D infill patternto satisfy the bulk property of the 3D infill pattern based on theprinting material; and printing the first 3D shape filled with the 3Dinfill pattern having the bulk property of the 3D infill pattern.
 2. Themethod of claim 1, further comprising: identifying, within the nativefile, a second 3D shape associated with the 3D infill pattern, whereinthe slicer description language file further comprises a third sectioncomprising instructions to print the second 3D shape filled withmultiple instances of the 3D infill pattern by referencing the firstsection.
 3. The method of claim 1, wherein: the first 3D shape in thenative file is further associated with a texture pattern on a surface ofthe first 3D shape; the slicer description language file furthercomprises a third section specifying the texture pattern; the secondsection of the slicer description language file further comprisesinstructions to print the first 3D shape according to the texturepattern by referencing the third section; and the 3D printer prints thefirst 3D shape with the texture pattern on the surface.
 4. The method ofclaim 3, wherein one of the first section, the second section, and thethird section specifies a bulk property for the texture pattern, theslicer further determines a print parameter of the texture pattern basedon the printing material to satisfy the bulk property for the texturepattern, and the 3D printer prints the first 3D shape having the bulkproperty for the texture pattern.
 5. The method of claim 4, wherein thebulk property for the texture pattern is one selected from a groupconsisting of grip value and surface roughness.
 6. The method of claim4, wherein the print parameter of the texture pattern is a surfacepattern-scale.
 7. The method of claim 1, wherein the bulk property ofthe 3D infill pattern is one selected from a group consisting of tensilestrength and density.
 8. The method of claim 1, wherein the 3D infillpattern is a honeycomb, and wherein the print parameter of the 3D infillpattern is a wall thickness of a cell in the honeycomb.
 9. A system forthree-dimensional (3D) printing, comprising: a memory; a computerprocessor that: obtains a native file of a computer-aided design (CAD)application; identifies, within the native file, a first 3D shapeassociated with a 3D infill pattern and a bulk property of the 3D infillpattern; generates a slicer description language file comprising: afirst section specifying the 3D infill pattern; and a second sectioncomprising instructions to print the first 3D shape filled with multipleinstances of the 3D infill pattern by referencing the first section,wherein the first section and the second section are separate in theslicer description language file, and wherein one of the first sectionand the second section specifies the bulk property of the 3D infillpattern; sends the slicer description language file; and a 3D printerthat: receives the slicer description language file; determines, using aslicer software, a print parameter of the 3D infill pattern to satisfythe bulk property of the 3D infill pattern based on a printing material;and prints, based on the slicer description language file, the first 3Dshape filled with the 3D infill pattern having the bulk property of the3D infill pattern.
 10. The system of claim 9, wherein the computerprocessor also: identifies, within the native file, a second 3D shapeassociated with the 3D infill pattern, wherein the slicer descriptionlanguage file further comprises a third section comprising instructionsto print the second 3D shape filled with multiple instances of the 3Dinfill pattern by referencing the first section.
 11. The system of claim9, wherein: the first 3D shape in the native file is further associatedwith a texture pattern on a surface of the first 3D shape; the slicerdescription language file further comprises a third section specifyingthe texture pattern; the second section of the slicer descriptionlanguage file further comprises instructions to print the first 3D shapeaccording to the texture pattern by referencing the third section; andthe 3D printer prints the first 3D shape with the texture pattern on thesurface.
 12. The system of claim 9, wherein the bulk property of the 3Dinfill pattern is one selected from a group consisting of tensilestrength and density.
 13. The system of claim 9, wherein the 3D infillpattern is a honeycomb, and wherein the print parameter of the 3D infillpattern is a wall thickness of a cell in the honeycomb.
 14. Anon-transitory computer readable medium (CRM) storing computer readableprogram code executed by a computer processor that: obtains a nativefile of a computer-aided design (CAD) application; identifies, withinthe native file, a first 3D shape associated with a 3D infill patternand a bulk property of the 3D infill pattern; generates a slicerdescription language file comprising: a first section specifying the 3Dinfill pattern; and a second section comprising instructions to printthe first 3D shape filled with multiple instances of the 3D infillpattern by referencing the first section, wherein the first section andthe second section are separate in the slicer description language file,and wherein one of the first section and the second section specifiesthe bulk property of the 3D infill pattern; sends the slicer descriptionlanguage file to a 3D printer that includes a slicer software and thatutilizes a printing material; determines, by the using the slicersoftware, a print parameter of the 3D infill pattern to satisfy the bulkproperty of the 3D infill pattern based on the printing material; andprints the first 3D shape filled with the 3D infill pattern having thebulk property of the 3D infill pattern.
 15. The non-transitory CRM ofclaim 14, wherein the program code executed by the computer processoralso: identifies, within the native file, a second 3D shape associatedwith the 3D infill pattern, wherein the slicer description language filefurther comprises a third section comprising instructions to print thesecond 3D shape filled with multiple instances of the 3D infill patternby referencing the first section.
 16. The non-transitory CRM of claim14, wherein: the first 3D shape in the native file is further associatedwith a texture pattern on a surface of the first 3D shape; the slicerdescription language file further comprises a third section specifyingthe texture pattern; the second section of the slicer descriptionlanguage file further comprises instructions to print the first 3D shapeaccording to the texture pattern by referencing the third section; andthe 3D printer prints the first 3D shape with the texture pattern on thesurface.
 17. The non-transitory CRM of claim 14, wherein the bulkproperty of the 3D infill pattern is one selected from a groupconsisting of tensile strength and density.
 18. The non-transitory CRMof claim 14, wherein the 3D infill pattern is a honeycomb, and whereinthe print parameter of the 3D infill pattern is a wall thickness of acell in the honeycomb.
 19. A method for three-dimensional (3D) printing,comprising: obtaining a native file of a computer-aided design (CAD)application; identifying, within the native file, a first 3D shapeassociated with a bulk property of a printed 3D infill pattern;generating a slicer description language file comprising: a plurality of3D infill pattern sections that each specify one of a plurality ofpredetermined 3D infill patterns; and a 3D shape section comprising thebulk property of the printed 3D infill pattern and instructions to printthe first 3D shape, wherein each of the plurality of 3D infill patternsections and the 3D shape section are separate in the slicer descriptionlanguage file; sending the slicer description language file to a 3Dprinter that includes a slicer software and that utilizes a printingmaterial; determining, by the slicer, which predetermined 3D infillpattern to use as the printed 3D infill pattern and a print parameter ofthe printed 3D infill pattern to satisfy the bulk property of theprinted 3D infill pattern based on the printing material; and printingthe first 3D shape filled with the printed 3D infill pattern having thebulk property of the printed 3D infill pattern.
 20. The method of claim19, wherein: the first 3D shape in the native file is further associatedwith a bulk property of a printed texture pattern on a surface of thefirst 3D shape; the slicer description language file further comprises aplurality of texture sections that each specify one of a plurality ofpredetermined texture patterns; the 3D shape section of the slicerdescription language file further comprises the bulk property of theprinted texture pattern; the slicer further determines whichpredetermined texture pattern to use as the printed texture pattern anda print parameter of the printed texture pattern to satisfy the bulkproperty of the printed texture pattern based on the printing material;and the 3D printer prints the first 3D shape having the bulk property ofthe printed texture pattern.